Algiers, Algeria to New York City is an approximately 17.5-hour flight. Traveling from Algiers to New York City, you'll gain 6 hours due to the time zone difference. When traveling from Algiers in April, plan for little chillier days in New York City, with highs around 19°C, while nights are about the same with lows around 9°C. Finish your sightseeing early on the 12th (Thu) to allow enough time to travel to Washington DC.

Fly from New York City to Washington DC in 3.5 hours. Alternatively, you can take a train; or drive. Traveling from New York City in April, you will find days in Washington DC are somewhat warmer (24°C), and nights are about the same (11°C). Wrap up your sightseeing by early afternoon on the 13th (Fri) to allow time for travel to San Francisco.

Fly from Washington DC to San Francisco in 7 hours. Alternatively, you can do a combination of train and flight; or drive. The time zone difference moving from Eastern Standard Time to Pacific Standard Time is minus 3 hours. Expect a daytime high around 22°C in April, and nighttime lows around 12°C. Wrap up your sightseeing on the 14th (Sat) early enough to travel back home.